How Did Lindsay Lohan Spend Her Birthday?

Lindsay Lohan spent her 21st birthday in a bikini and some high heels!
The rehabbing actress had a relatively (for her) low-key affair on the beach in Malibu, in plain view of her beloved paparazzi pals.
Lindsay was joined at her bash by friends and family, including her mother Dina “Orange Oprah” Lohan, sister Ali, brother Dakota and even British playboy / walking STD / former boyfriend Calum Best.
[Images via Pacific Coast News.]